Socket problem when flooding

Hello,

I'm having a strange issue with TCP socket.

I'm trying to write to a socket stream as fast as possible so I do something like :

c = 'a';
while(1) {
  write(sock, &c, sizeof(c));
}

I use a telnet client to test my code : I get a random number of 'a', a freeze, and then the sock hangs (write return -1 with errno set to EPIPE).

I've used ethereal to investigate. The problem is the board is sending a TCP packet with a wrong checksum. This packet is send several times and then the board send a RST.

It seems to me there is something wrong with memory which corrupt the packet's data.

Did someone succeed flooding a socket stream ?

I'm using the FreeBSD stack on a cyclone II developement board with the default network settings.

thanks in advance,

sly